Camera module and portable terminal

ABSTRACT

A camera module includes a lens module including a plurality of lenses having refractive power, a first optical path folding unit disposed on the object side of the lens module and configured to refract or reflect incident light in an optical axis direction of the lens module. Among the lenses constituting the lens module, an effective radius of a lens closest to the first optical path folding unit may have substantially the same size as an effective radius of an exit surface of the first optical path folding unit.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit under 35 USC 119(a) of Korean PatentApplication No. 10-2020-0103310 filed on Aug. 18, 2020 in the KoreanIntellectual Property Office, the entire disclosure of which isincorporated herein by reference for all purposes.

BACKGROUND 1. Field

The following description relates to a camera module and a portableterminal, in which resolution degradation caused by a reflectionphenomenon occurring from an incident surface or an exit surface of alight transmitting member may be significantly reduced.

2. Description of Related Art

Camera modules include light transmitting members. For example, a cameramodule includes a filter member for blocking ultraviolet rays. Asanother example, a camera module may include an optical path foldingunit such as a prism or the like. Light-transmitting members such asfilter members and prisms are configured to transmit light. Theinterface of a light-transmitting member in which light is incident oremitted is a part at which the refractive index of a medium changes, andthus, light reflection occurs. The reflection of light at the interfaceof the light transmitting member may lower the resolution of the cameramodule and cause a flare phenomenon.

SUMMARY

This Summary is provided to introduce a selection of concepts insimplified form that are further described below in the DetailedDescription. This Summary is not intended to identify key features oressential features of the claimed subject matter, nor is it intended tobe used as an aid in determining the scope of the claimed subjectmatter.

Examples provide a camera module and a portable terminal configured toreduce or suppress a reflection phenomenon of light generated from alight transmitting member.

In a general aspect, a camera module includes a lens module including aplurality of lenses having a refractive power, a first optical pathfolding unit disposed on the object side of the lens module andconfigured to refract or reflect incident light in an optical axisdirection of the lens module. Among the lenses constituting the lensmodule, an effective radius of a lens closest to the first optical pathfolding unit may have substantially the same size as an effective radiusof an exit surface of the first optical path folding unit.

The camera module may satisfy 1.0<PRh/LES1<1.10, where PRh is a maximumeffective radius of an exit surface of the first optical path foldingunit and LES1 is a maximum effective radius of a lens closest to theobject side in the lens module

The first optical path folding unit may include an antireflection layerdisposed thereon.

The antireflection layer may be disposed on one or both of an incidentsurface of the first optical path folding unit and the exit surface ofthe first optical path folding unit.

The antireflection layer may include a plurality of protrusions.

The antireflection layer may include a first antireflection layerdisposed on an incident surface of the first optical path folding unitand including a first protrusion; and a second antireflection forminglayer disposed on the exit surface of the first optical path foldingunit and including a second protrusion.

The first protrusion and the second protrusion may have different sizes.

A formation gap of the first protrusion may be different from aformation gap of the second protrusion.

At least one or more of lenses constituting the lens module may beconfigured to have different sizes in a first direction and a seconddirection intersecting an optical axis.

The lens module may include a first lens, a second lens, a third lens, afourth lens, and a fifth lens sequentially disposed from the object sideof the lens module.

The first lens, the third lens and the fifth lens may have a positiverefractive power, and the second lens and the fourth lens may have anegative refractive power.

At least four of the first lens, the second lens, the third lens, thefourth lens, and the fifth lens may have a convex object-side surface.

At least three of the first lens, the second lens, the third lens, thefourth lens, and fifth lens may have a concave image-side surface.

The camera module may include a second optical path folding unitdisposed between the lens module and an image plane.

A second antireflection layer may include a protrusion and may bedisposed on one or both of an incident surface of the second opticalpath folding unit and an exit surface of the second optical path foldingunit.

A portable terminal may include the camera module.

Other features and aspects will be apparent from the following detaileddescription, the drawings, and the claims.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a configuration diagram of a camera module according to anexample.

FIGS. 2A and 2B are enlarged views of a first optical path folding unitaccording to an example.

FIG. 3 is an enlarged view of portion A illustrated in FIGS. 2A and 2B.

FIG. 4 is an enlarged view of a first optical path folding unitaccording to another form.

FIGS. 5A and 5B are enlarged views of portions B and D illustrated inFIG. 4 .

FIGS. 6A and 6B are enlarged perspective views of lenses constituting alens module.

FIG. 7 is a configuration diagram of a camera module including a lensmodule according to an example.

FIG. 8 is an aberration diagram of the lens module illustrated in FIG. 7.

FIG. 9 is a configuration diagram of a camera module including a lensmodule according to another example.

FIG. 10 is an aberration diagram of the lens module illustrated in FIG.9 .

FIG. 11 is a configuration diagram of a camera module including a lensmodule according to another example.

FIG. 12 is an aberration diagram of the lens module illustrated in FIG.11 .

FIG. 13 is a configuration diagram of a camera module including a lensmodule according to another example.

FIG. 14 is an aberration diagram of the lens module illustrated in FIG.13 .

FIG. 15 is a configuration diagram of a camera module including a lensmodule according to another example.

FIG. 16 is an aberration diagram of the lens module illustrated in FIG.15 .

FIG. 17 is a configuration diagram of a camera module including a lensmodule according to another example.

FIG. 18 is an aberration diagram of the lens module illustrated in FIG.17 .

FIG. 19 is an enlarged view of a first optical path folding unitillustrated in FIG. 18 .

FIG. 20 is an enlarged view of a second optical path folding unitillustrated in FIG. 18 .

FIG. 21 is a rear view of a portable terminal according to an example.

Throughout the drawings and the detailed description, the same referencenumerals refer to the same elements. The drawings may not be to scale,and the relative size, proportions, and depictions of elements in thedrawings may be exaggerated for clarity, illustration, and convenience.

DETAILED DESCRIPTION

The following detailed description is provided to assist the reader ingaining a comprehensive understanding of the methods, apparatuses,and/or systems described herein. However, various changes,modifications, and equivalents of the methods, apparatuses, and/orsystems described herein will be apparent to one of ordinary skill inthe art. The sequences of operations described herein are merelyexamples, and are not limited to those set forth herein, but may bechanged, as will be apparent to one of ordinary skill in the art, withthe exception of operations necessarily occurring in a certain order.Also, descriptions of functions and constructions that would be wellknown to one of ordinary skill in the art may be omitted for increasedclarity and conciseness.

The features described herein may be embodied in different forms, andare not to be construed as being limited to the examples describedherein. Rather, the examples described herein have been provided so thatthis disclosure will be thorough and complete, and will fully convey thescope of the disclosure to one of ordinary skill in the art.

Herein, it is to be noted that use of the term “may” with respect to anembodiment or example, e.g., as to what an embodiment or example mayinclude or implement, means that at least one embodiment or exampleexists in which such a feature is included or implemented while allexamples and examples are not limited thereto.

Throughout the specification, when an element, such as a layer, region,or substrate, is described as being “on,” “connected to,” or “coupledto” another element, it may be directly “on,” “connected to,” or“coupled to” the other element, or there may be one or more otherelements intervening therebetween. In contrast, when an element isdescribed as being “directly on,” “directly connected to,” or “directlycoupled to” another element, there can be no other elements interveningtherebetween.

As used herein, the term “and/or” includes any one and any combinationof any two or more of the associated listed items.

Although terms such as “first,” “second,” and “third” may be used hereinto describe various members, components, regions, layers, or sections,these members, components, regions, layers, or sections are not to belimited by these terms. Rather, these terms are only used to distinguishone member, component, region, layer, or section from another member,component, region, layer, or section. Thus, a first member, component,region, layer, or section referred to in examples described herein mayalso be referred to as a second member, component, region, layer, orsection without departing from the teachings of the examples.

Spatially relative terms such as “above,” “upper,” “below,” and “lower”may be used herein for ease of description to describe one element'srelationship to another element as illustrated in the figures. Suchspatially relative terms are intended to encompass differentorientations of the device in use or operation in addition to theorientation depicted in the figures. For example, if the device in thefigures is turned over, an element described as being “above” or “upper”relative to another element will then be “below” or “lower” relative tothe other element. Thus, the term “above” encompasses both the above andbelow orientations depending on the spatial orientation of the device.The device may also be oriented in other ways (for example, rotated 90degrees or at other orientations), and the spatially relative terms usedherein are to be interpreted accordingly.

The terminology used herein is for describing various examples only, andis not to be used to limit the disclosure. The articles “a,” “an,” and“the” are intended to include the plural forms as well, unless thecontext clearly indicates otherwise. The terms “comprises,” “includes,”and “has” specify the presence of stated features, numbers, operations,members, elements, and/or combinations thereof, but do not preclude thepresence or addition of one or more other features, numbers, operations,members, elements, and/or combinations thereof.

Due to manufacturing techniques and/or tolerances, variations of theshapes illustrated in the drawings may occur. Thus, the examplesdescribed herein are not limited to the specific shapes illustrated inthe drawings, but include changes in shape occurring duringmanufacturing.

The features of the examples described herein may be combined in variousways as will be apparent after gaining an understanding of thedisclosure of this application. Further, although the examples describedherein have a variety of configurations, other configurations arepossible as will be apparent after gaining an understanding of thedisclosure of this application.

The drawings may not be to scale, and the relative sizes, proportions,and depictions of elements in the drawings may be exaggerated forclarity, illustration, and convenience.

An optical imaging system includes a plurality of lenses disposed alongan optical axis. The plurality of lenses may be spaced apart from eachother by predetermined distances along the optical axis.

For example, the optical imaging system includes a first lens, a secondlens, a third lens, a fourth lens, and a fifth sequentially disposed inascending numerical order along the optical axis from an object side ofthe optical imaging system toward an imaging plane of the opticalimaging system, with the first lens being closest to the object side ofthe optical imaging system and the fifth lens being closest to theimaging plane.

In each lens, an object-side surface or a first surface is a surface ofthe lens closest to the object side of the optical imaging system, andan image-side surface or a second surface is a surface of the lensclosest to the imaging plane.

Unless stated otherwise, a reference to a shape of a lens surface refersto a shape of a paraxial region of the lens surface. A paraxial regionof a lens surface is a central portion of the lens surface surroundingand including the optical axis of the lens surface in which light raysincident to the lens surface make a small angle θ to the optical axis,and the approximations sin θ≈θ, tan θ≈θ, and cos θ≈1 are valid.

For example, a statement that an object-side surface of a lens is convexmeans that at least a paraxial region of the object-side surface of thelens is convex, and a statement that an image-side surface of the lensis concave means that at least a paraxial region of the image-sidesurface of the lens is concave. Therefore, even though the object-sidesurface of the lens may be described as being convex, the entireobject-side surface of the lens may not be convex, and a peripheralregion of the object-side surface of the lens may be concave. Also, eventhough the image-side surface of the lens may be described as beingconcave, the entire image-side surface of the lens may not be concave,and a peripheral region of the image-side surface of the lens may beconvex.

At least one of the first to fifth lenses of the optical imaging systemmay have at least one aspherical surface.

For example, either one or both of the object-side surface and theimage-side surface of at least one of the first to fifth lenses may beaspherical. Each aspherical surface is defined by Equation 1 below.

$\begin{matrix}{Z = {\frac{cY^{2}}{1 + \sqrt{1 - {\left( {1 + K} \right)c^{2}Y^{2}}}} + {AY}^{4} + {BY}^{6} + {CY}^{8} + {DY}^{10} + {EY}^{12} + {FY}^{14} + {GY}^{16} + {HY}^{18}}} & (1)\end{matrix}$

In Equation 1, c is a curvature of a lens surface and is equal to areciprocal of a radius of curvature of the lens surface at an opticalaxis of the lens surface, K is a conic constant, Y is a distance fromany point on the lens surface to the optical axis of the lens surface ina direction perpendicular to the optical axis of the lens surface, A toH are aspheric constants, and Z (also known as sag) is a distance in adirection parallel to the optical axis of the lens surface from thepoint on the lens surface at the distance Y from the optical axis of thelens surface to a tangential plane perpendicular to the optical axis andintersecting a vertex of the lens surface.

The optical imaging system may further include other elements inaddition to the first to fifth lenses.

The optical imaging system may further include at least one stopdisposed before the first lens, or between any two adjacent lenses ofthe first to fifth lenses, or between the fifth lens and the imagingplane. The optical imaging system may include two or more stops disposedat different locations.

The optical imaging system may further include an image sensor having animaging surface disposed at the imaging plane of the optical imagingsystem. The image sensor converts an image of an object formed on aneffective imaging area of the imaging surface by the lenses of theoptical imaging system into an electrical signal

The optical imaging system may further include an infrared blockingfilter, hereinafter referred to as a filter, for blocking infraredlight. The filter may be disposed between the fifth lens and the imagingplane.

The optical imaging system may further include at least one reflectivemember having a reflective surface that changes a direction of anoptical path in the optical imaging system. For example, the reflectivemember may be a prism or a mirror.

For example, the reflective member may be disposed in the optical pathon the object-side of the first lens, between any two lenses among thesecond to fifth lenses, or on the image-side of the fifth lens.

For example, the optical imaging system may further include a firstreflective member disposed in an optical path between the object side ofthe optical imaging system and the object-side surface of the firstlens. Therefore, the first lens may be a lens disposed closest to thefirst reflective member among the first to fifth lenses.

Also, the optical imaging system may further include a second reflectivemember disposed in an optical path between the image-side surface of thefifth lens and the imaging plane. Therefore, the fifth lens may be alens disposed closest to the second reflective member among the first tofifth lenses.

-   -   TTL is a distance along the optical axis from the object-side        surface of the first lens to the imaging plane.    -   SL is a distance along the optical axis from a stop of the        optical imaging system to the imaging plane.    -   BFL is a distance along the optical axis from the image-side        surface of the lens to the imaging plane.    -   PTTL is a distance along the optical axis from the reflective        surface of the first reflective member to the imaging plane.    -   ImgH is a maximum effective image height of the optical imaging        system and is equal to one half of a diagonal length of the        effective imaging area of the imaging surface of the image        sensor.    -   f is a focal length of the optical imaging system, and f1, f2,        f3, f4, and f5 are respective focal lengths of the first to        fifth lenses.    -   FOV is an angle of view of the optical imaging system.    -   Fno is an f-number of the optical imaging system, and is equal        to the focal length f of the optical imaging system divided by        an entrance pupil diameter of the optical imaging system.

An effective aperture radius of a lens surface is a radius of a portionof the lens surface through which light actually passes, and is notnecessarily a radius of an outer edge of the lens surface. Statedanother way, an effective aperture radius of a lens surface is adistance in a direction perpendicular to an optical axis of the lenssurface between the optical axis and a marginal ray of light passingthrough the lens surface. The object-side surface of a lens and theimage-side surface of the lens may have different effective apertureradiuses.

Radiuses of curvature of the surfaces of the lenses, thickness of thelenses and the other elements, distances between adjacent ones of thelenses and the other elements, focal lengths of the lenses, the focallength f of the optical imaging system, the respective focal lengths f1,f2, f3, f4, and f5 of the first to fifth lenses, TTL, SL, BFL, PTTL, andImgH are expressed in millimeters (mm), although other units ofmeasurement may be used. FOV is expressed in degrees. Fno, refractiveindexes of the lenses, and Abbe numbers of the lenses are dimensionlessquantities.

The thicknesses of the lenses and the other elements, the distancesbetween the adjacent ones of the lenses and the other elements, TTL, SL,BFL, and PTTL are measured along the optical axis of the optical imagingsystem.

A camera module according to an example will be described with referenceto FIG. 1 .

A camera module 100 may include a first optical path folding unit 200and a lens module 500.

The first optical path folding unit 200 may be disposed foremost in thecamera module 100. The first optical path folding unit 200 may bedisposed on the object side of the lens module 500. The first opticalpath folding unit 200 may be configured to refract or reflect lightincident through an opening of the camera module 100 in the optical axisdirection of the lens module 500. For example, the first optical pathfolding unit 200 may refract or reflect light incident along a firstoptical axis C1 in the direction of a second optical axis C2. The firstoptical axis C1 and the second optical axis C2 may intersect each other.The first optical path folding unit 200 may be in the form of a prism ora reflector. However, the shape of the first optical path folding unit200 is not limited to a prism and a reflector.

The lens module 500 may include one or more lenses. For example, thelens module 500 may include two or more lenses. However, the number oflenses constituting the lens module 500 is not limited to two. Forexample, the lens module 500 may be comprised of 5 lenses as illustratedin FIG. 1 .

The lens module 500 may form a predetermined size relationship with thefirst optical path folding unit 200. For example, a maximum effectiveradius LES1 of the lens closest to the object side in the lens module500 may be substantially the same size as a maximum effective radius PRhof an exit surface of the first optical path folding unit 200. Indetail, PRh/LES1 may be greater than 1.0 and less than 1.10.

The camera module 100 may further include a filter IF and an imagesensor IP. The filter IF and the image sensor IP may be disposed behindthe lens module 500. The filter IF may be configured to block a specificwavelength from light incident on the image sensor IP. For example, thefilter IF may be configured to block light having an infraredwavelength. The image sensor IP may be configured to convert an incidentoptical signal into an electric signal. For example, the image sensor IPmay have a CMOS type.

The camera module 100 according to an example may be configured tosuppress a flare phenomenon. For example, the camera module 100 mayinclude an antireflection layer 300.

The antireflection layer 300 may be configured to reduce a flarephenomenon caused by reflection of light incident on the camera module100. The antireflection layer 300 may be formed on the first opticalpath folding unit 200 as illustrated in FIGS. 2A and 2B. For example,the antireflection layer 300 may be formed on the incident surface ofthe first optical path folding unit 200 (FIG. 2A) or on the exit surfaceof the first optical path folding unit 201 (FIG. 2B). The antireflectionlayer 300 may reduce the size of the first optical path folding unit200. For example, by using the antireflection layer 300, the size(PRhx*2) of the first optical path folding unit 200 in the widthdirection or the size (PRhy*2) thereof in the height direction, or thesize (PRhx*2) of the first optical path folding unit 200 in the widthdirection and the size (PRhy*2) thereof in the height direction may bereduced. Accordingly, the camera module 100 according to an example isadvantageous for miniaturization and thinning, and thus may be mountedon an ultra-thin portable terminal.

The antireflection layer 300 may include a plurality of protrusions 310formed at a first height h1 as illustrated in FIG. 3 . The protrusions310 may be disposed along the incident surface or exit surface of thefirst optical path folding unit 200 at a first gap P1 between theprotrusions 310. The first height h1 and the first gap P1 of theprotrusion 310 may vary depending on the type of the camera module 100or the formation position of the antireflection layer 300. For example,the first height h1 or the first gap P1 of the protrusion 310 formed onthe incident surface of the first optical path folding unit 200 may bedifferent from the first height h1 or the first gap P1 of the protrusion310 formed on the exit surface of the first optical path folding unit200. However, the protrusions 310 formed on the incident surface of thefirst optical path folding unit 200 and the protrusions 310 formed onthe exit surface thereof are not necessarily formed at different heightsor at different gaps.

According to another example, as illustrated in FIGS. 4, 5A, and 5B,antireflection layers 300 and 302 may be formed on both the incidentsurface and the exit surface of the first optical path folding unit 202.The first antireflection layer 300 formed on the incidence surface ofthe first optical path folding unit 202 may be configured differentlyfrom the second antireflection layer 302 formed on the exit surface ofthe first optical path folding unit 202. For example, the first heighth1 of the first protrusion 310 constituting the first antireflectionlayer 300 and the first gap P1 between the first protrusions 310 may bedifferent from the second height h2 of the second protrusion 320 and thesecond gap P2 between the second protrusions 320. For example, the firstheight h1 of the first protrusion 310 may be less than the second heighth2 of the second protrusion 320. As another example, the first gap P1between the first protrusions 310 may be less than the second gap P2between the second protrusions 320. However, the large-smallrelationship between the first protrusion 310 of the firstantireflection layer 300 and the second protrusion 320 of the secondantireflection layer 302 is not limited to the above-described form. Forexample, the first height h1 of the first protrusion 310 may be greaterthan the second height h2 of the second protrusion 320. As anotherexample, the first gap P1 between the first protrusions 310 may begreater than the second gap P2 between the second protrusions 320.

The first optical path folding unit 202 according to this form has theantireflection layers 300 and 302 formed on both the incident surfaceand the exit surface, and thus, the reflection of light that may becaused on the incident surface and the exit surface and a flarephenomenon caused by the reflection of light may be blocked oralleviated.

Next, a foremost lens (a lens closest to the object side) of the lensmodule 500 will be described with reference to FIGS. 6A and 6B.

The lens module 500 may include a plurality of lenses. One of theplurality of lenses may be formed larger than the other lenses. Forexample, in the lens module 500, effective radiuses LES1x and LES1y ofthe foremost lens 510 may be greater than the effective radiuses ofother lenses. Effective diameters (2*LES1x, 2*LES1y) of the foremostlens 510 may have substantially the same size as the width or height ofthe exit surface of the first optical path folding unit 300. As anexample, the effective diameter (2*LES1x) of the foremost lens 510 inthe first direction may have a size substantially equal to or smallerthan the width (2*PRhx) of the exit surface of the first optical pathfolding unit 300. As another example, the effective diameter (2*LES1y)of the foremost lens 510 in the second direction may have a sizesubstantially equal to or smaller than the height (2*PRhy) of the exitsurface of the first optical path folding unit 300. The foremost lens510 may be formed to have different sizes in a first directionintersecting the second optical axis C2 and in a second directionintersecting the second optical axis C2. For example, when viewed fromthe second optical axis (C2) direction, the foremost lens 510 may have asubstantially rectangular shape.

The foremost lens 510 may be configured in the form illustrated in FIG.6B to enable the camera module 100 to be thinner. For example, theeffective radius LES1y of the foremost lens 510 in the second directionmay be less than the effective radius LES1x of the foremost lens 510 inthe first direction.

The camera module 100 including the first optical path folding unit 200(or 201 or 202), the lens module 500, and the antireflection layers 300and/or 302 of the above-described form may substantially reduce thereflection by incident light and a flare phenomenon due to reflection oflight, and thus, high-resolution photos and video may be obtained.

Next, the configuration of the lens module constituting the cameramodule will be described in detail.

The camera module according to an example may include a lens module thatsatisfies one or more of the following conditional expressions.10 mm≤f1.0<PRh/LES1<1.13.2<n2+n3|f1+f2|<2.00≤DL1L2/f0.8<ELS1/ImgHT<1.50.8≤EL1S2/EL1S1≤1.00.8≤TTL/f≤0.953.5≤TTL/ImgHT0.2<R1/f≤0.62.6<f-number|f/f1+f/f2|<1.24.0<f/(f-number)

In the above conditional expressions, f is the focal length of theoptical system, PRh is a maximum effective radius of the optical pathfolding unit, LES1 is a maximum effective radius of the lensconstituting the lens module, n2 is the refractive index of the secondlens, n3 is the refractive index of the third lens, f1 is the focallength of the first lens, f2 is the focal length of the second lens,DL1L2 is the distance from the image-side surface of the first lens tothe object-side surface of the second lens, EL1S1 is the effectiveradius of the object-side surface of the first lens, EDS2 is theeffective radius of the image-side surface of the first lens, TTL is thedistance from the object-side surface of the first lens to the imageplane, ImgHT is the height of the image plane (one-half of a diagonallength of the image plane), and R1 is the radius of curvature of theobject-side surface of the first lens.

Next, a detailed example of the camera module will be described.

First, a camera module according to a first example will be describedwith reference to FIG. 7 .

A camera module 101 may include a first optical path folding unit 201, alens module 501, a filter IF, and an image sensor IP.

The first optical path folding unit 201 may be configured to refract orreflect a path of incident light incident along a first optical axis C1in the direction of a second optical axis C2. For example, the firstoptical path folding unit 201 may be a prism. As described above, anantireflection layer may be formed on the incident surface or the exitsurface or the incident surface and the exit surface of the firstoptical path folding unit 201.

The filter IF is disposed in front of the image sensor IP, and may blockinfrared rays or the like included in the incident light. The imagesensor IP may be comprised of a plurality of optical sensors. The imagesensor IP may be configured to convert an optical signal into anelectrical signal. The image sensor IP may form an image plane on whichlight incident through the lens module 501 is imaged.

The lens module 501 includes a first lens 511, a second lens 521, athird lens 531, a fourth lens 541, and a fifth lens 551 sequentiallydisposed from the object side.

The first lens 511 has positive refractive power. The fifth lens 521 hasa convex object-side surface and a convex image-side surface. The secondlens 521 has negative refractive power. The second lens 521 has a convexobject-side surface and a concave image-side surface. The third lens 531has positive refractive power. The third lens 531 has a convexobject-side surface and a concave image-side surface. The fourth lens541 has negative refractive power. The fourth lens 541 has a convexobject-side surface and a concave image-side surface. The fifth lens 551has positive refractive power. The fifth lens 551 has a convexobject-side surface and a concave image-side surface.

Table 1 illustrates the lens characteristics of the lens module 501, andTable 2 provides the aspherical surface values of the lens module 501.FIG. 8 is an aberration curve of the lens module 501 configured asabove.

TABLE 1 Surface Curvature Thickness/ Refractive Abbe Effective NumberRemark Radius Distance Index Number Radius S1 Prism Infinity 0.000 2.625S2 Infinity 2.525 1.723 29.5 2.525 S3 Infinity 2.525 1.723 29.5 3.571 S4Infinity 1.000 2.525 S5 First 4.54 1.968 1.537 55.7 2.500 Lens S6 −11.600.058 2.300 S7 Second 321.87 1.030 1.621 26.0 2.193 Lens S8 3.51 1.2521.834 S9 Third 4.11 1.074 1.679 19.2 1.742 S10 Lens 12.66 0.100 1.596S11 Fourth 10.14 0.447 1.621 26.0 1.563 Lens S12 2.75 1.342 1.422 S13Fifth 6.25 0.804 1.547 56.1 1.816 Lens S14 27.56 7.567 1.816 S15 FilterInfinity 0.188 1.519 64.2 2.525 S16 Infinity 0.680 2.540 S17 ImageInfinity 0.002 2.620 Plane

TABLE 2 Surface Number S5 S6 S7 S8 S9 K −0.68631 −2.34166 −99.000000.07210 0.06836 A −0.00037 −0.00105 0.00204 0.00454 0.00383 B 0.000010.00003 −0.00021 −0.00005 −0.00034 C 0.00000 0.00000 0.00000 0.000020.00001 D 0.00000 0.00000 0.00000 0.00000 0.00000 E 0.00000 0.000000.00000 0.00000 0.00000 F 0.00000 0.00000 0.00000 0.00000 0.00000 G0.00000 0.00000 0.00000 0.00000 0.00000 H 0.00000 0.00000 0.000000.00000 0.00000 J 0.00000 0.00000 0.00000 0.00000 0.00000 Surface NumberS10 S11 S12 S13 S14 K −4.00987 3.54991 −0.09767 −0.62797 −21.94380 A0.00422 0.00366 0.00836 0.00742 0.00535 B −0.00053 0.00009 −0.00058−0.00030 0.00017 C 0.00005 −0.00008 −0.00022 −0.00013 −0.00005 D 0.000000.00002 −0.00004 −0.00002 −0.00003 E 0.00000 0.00000 0.00003 0.000000.00000 F 0.00000 0.00000 0.00000 0.00000 0.00000 G 0.00000 0.000000.00000 0.00000 0.00000 H 0.00000 0.00000 0.00000 0.00000 0.00000 J0.00000 0.00000 0.00000 0.00000 0.00000

A camera module according to a second example will be described withreference to FIG. 9 .

A camera module 102 may include a first optical path folding unit 202, alens module 502, a filter IF, and an image sensor IP.

The first optical path folding unit 202 may be configured to refract orreflect a path of incident light incident along a first optical axis C1in the direction of a second optical axis C2. For example, the firstoptical path folding unit 202 may be a prism. As described above, anantireflection layer may be formed on the incident surface or the exitsurface or on the incident surface and the exit surface of the firstoptical path folding unit 202.

The filter IF is disposed in front of the image sensor IP, and may blockinfrared rays or the like included in the incident light. The imagesensor IP may be comprised of a plurality of optical sensors. The imagesensor IP may be configured to convert an optical signal into anelectrical signal. The image sensor IP may form an image plane on whichlight incident through the lens module 502 is imaged.

The lens module 502 includes a first lens 512, a second lens 522, athird lens 532, a fourth lens 542, and a fifth lens 552.

The first lens 512 has positive refractive power. The fifth lens 512 hasa convex object-side surface and a convex image-side surface. The secondlens 522 has negative refractive power. The second lens 522 has a convexobject-side surface and a concave image-side surface. The third lens 532has positive refractive power. The third lens 532 has a convexobject-side surface and a convex image-side surface. The fourth lens 542has negative refractive power. The fourth lens 542 has a concaveobject-side surface and a concave image-side surface. The fifth lens 552has positive refractive power. The fifth lens 552 has a convexobject-side surface and a concave image-side surface.

Table 3 shows the lens characteristics of the lens module 502, and Table4 shows the aspherical surface values of the lens module 502. FIG. 10illustrates an aberration curve of the lens module 502 configured asabove.

TABLE 3 Surface Curvature Thickness/ Refractive Abbe Effective NumberRemark Radius Distance Index Number Radius S1 Prism Infinity 0.000 3.805S2 Infinity 3.596 1.723 29.5 3.596 S3 Infinity 3.596 1.723 29.5 5.085 S4Infinity 1.000 3.596 S5 First 6.05 1.996 1.537 55.7 3.560 Lens S6 −44.440.211 3.397 S7 Second 48.21 1.290 1.621 26.0 3.248 Lens S8 5.18 1.8302.789 S9 Third 8.84 1.647 1.679 19.2 2.655 Lens S10 −47.84 0.200 2.513S11 Fourth −48.90 1.310 1.621 26.0 2.450 Lens S12 5.00 1.660 2.220 S13Fifth 6.56 1.352 1.547 56.1 2.300 Lens S14 26.53 11.128 2.363 S15 FilterInfinity 0.210 1.519 64.2 3.680 S16 Infinity 2.338 3.697 S17 ImageInfinity 0.002 4.001 Plane

TABLE 4 Surface Number S5 S6 S7 S8 S9 K −0.63329 6.46596 69.135520.02568 0.24790 A −0.00015 −0.00031 0.00063 0.00149 0.00115 B 0.000000.00000 −0.00003 0.00000 −0.00005 C 0.00000 0.00000 0.00000 0.000000.00000 D 0.00000 0.00000 0.00000 0.00000 0.00000 E 0.00000 0.000000.00000 0.00000 0.00000 F 0.00000 0.00000 0.00000 0.00000 0.00000 G0.00000 0.00000 0.00000 0.00000 0.00000 H 0.00000 0.00000 0.000000.00000 0.00000 J 0.00000 0.00000 0.00000 0.00000 0.00000 Surface NumberS10 S11 S12 S13 S14 K 23.65017 89.39002 −0.15819 −0.69908 −7.63334 A0.00137 0.00108 0.00278 0.00244 0.00128 B −0.00008 0.00001 −0.00009−0.00003 0.00003 C 0.00000 −0.00001 −0.00001 −0.00001 0.00000 D 0.000000.00000 0.00000 0.00000 0.00000 E 0.00000 0.00000 0.00000 0.000000.00000 F 0.00000 0.00000 0.00000 0.00000 0.00000 G 0.00000 0.000000.00000 0.00000 0.00000 H 0.00000 0.00000 0.00000 0.00000 0.00000 J0.00000 0.00000 0.00000 0.00000 0.00000

A camera module according to a third example will be described withreference to FIG. 11 .

A camera module 103 may include a first optical path folding unit 203, alens module 503, a filter IF, and an image sensor IP.

The first optical path folding unit 203 may be configured to refract orreflect a path of incident light incident along a first optical axis C1in the direction of a second optical axis C2. For example, the firstoptical path folding unit 203 may be a prism. As described above, anantireflection layer may be formed on the incident surface or the exitsurface, or on the incident surface and the exit surface of the firstoptical path folding unit 203.

The filter IF is disposed in front of the image sensor IP, and may blockinfrared rays or the like included in the incident light. The imagesensor IP may be comprised of a plurality of optical sensors. The imagesensor IP may be configured to convert an optical signal into anelectrical signal. The image sensor IP may form an image plane on whichlight incident through the lens module 503 is imaged.

The lens module 503 includes a first lens 513, a second lens 523, athird lens 533, a fourth lens 543, and a fifth lens 553.

The first lens 513 has positive refractive power. The fifth lens 523 hasa convex object-side surface and a convex image-side surface. The secondlens 523 has negative refractive power. The second lens 523 has aconcave object-side surface and a concave image-side surface. The thirdlens 533 has positive refractive power. The third lens 533 has a convexobject-side surface and a concave image-side surface. The fourth lens543 has negative refractive power. The fourth lens 543 has a convexobject-side surface and a concave image-side surface. The fifth lens 553has positive refractive power. The fifth lens 553 has a convexobject-side surface and a concave image-side surface.

Table 5 shows the lens characteristics of the lens module 503, and Table6 shows the aspherical surface values of the lens module 503. FIG. 12illustrates an aberration curve of the lens module 503 configured asabove.

TABLE 5 Surface Curvature Thickness/ Refractive Abbe Effective NumberRemark Radius Distance Index Number Radius S1 Prism Infinity 0.000 2.477S2 Infinity 2.265 1.723 29.5 2.265 S3 Infinity 2.265 1.723 29.5 3.204 S4Infinity 1.000 2.265 S5 First 3.38 1.542 1.537 55.7 2.243 Lens S6 −9.230.100 2.116 S7 Second −26.28 0.819 1.621 26.0 1.998 Lens S8 3.23 1.2521.634 S9 Third 3.78 0.628 1.679 19.2 1.494 Lens S10 35.28 0.100 1.408S11 Fourth 33.04 0.576 1.621 26.0 1.369 Lens S12 2.54 0.919 1.173 S13Fifth 4.19 0.612 1.547 56.1 1.327 Lens S14 9.29 4.500 1.386 S 15 FilterInfinity 0.110 1.519 64.2 2.490 S16 Infinity 1.245 2.508 S17 ImageInfinity 0.001 2.820 Plane

TABLE 6 Surface Number S5 S6 S7 S8 S9 K −0.59295 −1.76428 −36.005220.30070 0.42024 A −0.00101 −0.00190 0.00315 0.00603 0.00532 B −0.000060.00002 −0.00065 −0.00041 −0.00101 C 0.00001 0.00000 −0.00001 0.000050.00004 D 0.00000 0.00000 0.00000 −0.00002 0.00000 E 0.00000 0.000000.00000 0.00001 −0.00001 F 0.00000 0.00000 0.00000 0.00000 0.00000 G0.00000 0.00000 0.00000 0.00000 0.00000 H 0.00000 0.00000 0.000000.00000 0.00000 J 0.00000 0.00000 0.00000 0.00000 0.00000 Surface NumberS10 S11 S12 S13 S14 K 3.73586 88.93324 0.24307 −1.07421 −54.16544 A0.00759 0.00541 0.00998 0.01718 0.00735 B −0.00172 −0.00036 −0.00295−0.00274 −0.00034 C −0.00010 −0.00054 −0.00119 −0.00159 0.00035 D−0.00011 0.00001 −0.00018 0.00025 −0.00062 E −0.00002 −0.00001 0.000260.00000 0.00002 F 0.00000 0.00001 0.00001 −0.00005 0.00005 G 0.000000.00001 0.00001 −0.00001 −0.00002 H 0.00000 0.00000 0.00000 0.00000−0.00001 J 0.00000 0.00000 0.00000 0.00000 0.00001

A camera module according to a fourth example will be described withreference to FIG. 13 .

A camera module 104 may include a first optical path folding unit 204, alens module 504, a filter IF, and an image sensor IP.

The first optical path folding unit 204 may be configured to refract orreflect the path of incident light incident along a first optical axisC1 in the direction of a second optical axis C2. For example, the firstoptical path folding unit 204 may be a prism. As described above, anantireflection layer may be formed on the incident surface or the exitsurface, or on the incident surface and the exit surface of the firstoptical path folding unit 204.

The filter IF is disposed in front of the image sensor IP, and may blockinfrared rays or the like included in the incident light. The imagesensor IP may be comprised of a plurality of optical sensors. The imagesensor IP may be configured to convert an optical signal into anelectrical signal. The image sensor IP may form an image plane on whichlight incident through the lens module 504 is imaged.

The lens module 504 includes a first lens 514, a second lens 524, athird lens 534, a fourth lens 544, and a fifth lens 554.

The first lens 514 has positive refractive power. The fifth lens 524 hasa convex object-side surface and a convex image-side surface. The secondlens 524 has negative refractive power. The second lens 524 has aconcave object-side surface and a concave image-side surface. The thirdlens 534 has positive refractive power. The third lens 534 has a convexobject-side surface and a concave image-side surface. The fourth lens544 has negative refractive power. The fourth lens 544 has a convexobject-side surface and a concave image-side surface. The fifth lens 554has positive refractive power. The fifth lens 554 has a convexobject-side surface and a concave image-side surface.

Table 7 shows the lens characteristics of the lens module 504, and Table8 illustrates the aspherical surface values of the lens module 504. FIG.14 illustrates an aberration curve of the lens module 504 configured asabove.

TABLE 7 Surface Curvature Thickness/ Refractive Abbe Effective NumberRemark Radius Distance Index Number Radius S1 Prism Infinity 0.000 3.230S2 Infinity 3.090 1.723 29.5 3.090 S3 Infinity 3.090 1.723 29.5 4.370 S4Infinity 0.750 3.090 S5 First 4.23 1.912 1.537 55.7 3.000 Lens S6 −14.350.100 2.893 S7 Second 461.50 1.165 1.641 24.0 2.709 Lens S8 3.55 1.5502.131 S9 Third 4.18 0.760 1.679 19.2 1.975 Lens S10 110.23 0.295 1.885S11 Fourth 42.92 0.566 1.641 24.0 1.743 Lens S12 3.24 1.131 1.500 S13Fifth 6.41 0.698 1.547 56.1 1.617 Lens S14 8.89 5.000 1.641 S15 FilterInfinity 0.110 1.519 64.2 2.379 S16 Infinity 2.628 2.391 S17 ImageInfinity 0.009 2.824 Plane

TABLE 8 Surface Number S5 S6 S7 S8 S9 K −0.59421 −1.28570 99.000000.28270 0.44801 A −0.00055 −0.00103 0.00169 0.00355 0.00283 B −0.000020.00000 −0.00024 −0.00019 −0.00035 C 0.00000 0.00000 0.00000 0.000010.00001 D 0.00000 0.00000 0.00000 0.00000 0.00000 E 0.00000 0.000000.00000 0.00000 0.00000 F 0.00000 0.00000 0.00000 0.00000 0.00000 G0.00000 0.00000 0.00000 0.00000 0.00000 H 0.00000 0.00000 0.000000.00000 0.00000 J 0.00000 0.00000 0.00000 0.00000 0.00000 Surface NumberS10 S11 S12 S13 S14 K 99.00000 48.56246 0.30847 −2.84158 −44.71786 A0.00411 0.00307 0.00486 0.01056 0.00298 B −0.00065 −0.00016 −0.00100−0.00114 −0.00033 C −0.00002 −0.00015 −0.00020 −0.00058 0.00018 D−0.00002 0.00000 −0.00004 0.00006 −0.00013 E 0.00000 0.00000 0.000030.00000 0.00000 F 0.00000 0.00000 0.00000 0.00000 0.00000 G 0.000000.00000 0.00000 0.00000 0.00000 H 0.00000 0.00000 0.00000 0.000000.00000 J 0.00000 0.00000 0.00000 0.00000 0.00000

A camera module according to a fifth example will be described withreference to FIG. 15 .

A camera module 105 may include a first optical path folding unit 205, alens module 505, a filter IF, and an image sensor IP.

The first optical path folding unit 205 may be configured to refract orreflect a path of incident light incident along a first optical axis C1in the direction of a second optical axis C2. For example, the firstoptical path folding unit 205 may be a prism. As described above, anantireflection layer may be formed on the incident surface or the exitsurface, or on the incident surface and the exit surface of the firstoptical path folding unit 205.

The filter IF is disposed in front of the image sensor IP, and may blockinfrared rays or the like included in the incident light. The imagesensor IP may be comprised of a plurality of optical sensors. The imagesensor IP may be configured to convert an optical signal into anelectrical signal. The image sensor IP may form an image plane on whichlight incident through the lens module 505 is imaged.

The lens module 505 includes a first lens 515, a second lens 525, athird lens 535, a fourth lens 545, and a fifth lens 555.

The first lens 515 has positive refractive power. The fifth lens 525 hasa convex object-side surface and a convex image-side surface. The secondlens 525 has negative refractive power. The second lens 525 has aconcave object-side surface and a concave image-side surface. The thirdlens 535 has positive refractive power. The third lens 535 has a convexobject-side surface and a convex image-side surface. The fourth lens 545has negative refractive power. The fourth lens 545 has a concaveobject-side surface and a concave image-side surface. The fifth lens 555has positive refractive power. The fifth lens 555 has a convexobject-side surface and a concave image-side surface.

Table 9 shows the lens characteristics of the lens module 505, and Table10 shows the aspherical surface values of the lens module 505. FIG. 16illustrates an aberration curve of the lens module 505 configured asabove.

TABLE 9 Surface Curvature Thickness/ Refractive Abbe Effective NumberRemark Radius Distance Index Number Radius S1 Prism Infinity 0.000 3.176S2 Infinity 3.120 1.723 29.5 3.120 S3 Infinity 3.120 1.723 29.5 4.412 S4Infinity 0.750 3.120 S5 First 5.71 1.954 1.537 55.7 3.000 Lens S6 −69.370.034 2.785 S7 Second 244.43 1.085 1.646 23.5 2.754 Lens S8 4.88 0.9302.412 S9 Third 5.26 1.568 1.668 20.4 2.423 Lens S10 −38.32 0.072 2.242S11 Fourth −98.75 0.669 1.646 23.5 2.204 Lens S12 5.63 1.531 1.990 S13Fifth 15.51 0.980 1.546 56.0 1.935 Lens S14 16.62 15.391 1.902 S15Filter Infinity 0.110 1.519 64.2 2.823 S16 Infinity 2.147 2.828 S17Image Infinity −0.001 2.986 Plane

TABLE 10 Surface Number S5 S6 S7 S8 S9 K −0.44733 −7.83886 99.000000.15108 0.37211 A −0.00016 −0.00011 0.00020 0.00057 0.00043 B −0.000010.00000 −0.00001 0.00000 −0.00002 C 0.00000 0.00000 0.00000 0.000000.00000 D 0.00000 0.00000 0.00000 0.00000 0.00000 E 0.00000 0.000000.00000 0.00000 0.00000 F 0.00000 0.00000 0.00000 0.00000 0.00000 G0.00000 0.00000 0.00000 0.00000 0.00000 H 0.00000 0.00000 0.000000.00000 0.00000 J 0.00000 0.00000 0.00000 0.00000 0.00000 Surface NumberS10 S11 S12 S13 S14 K −62.20732 0.00000 0.42974 −7.39730 −24.78544 A−0.00001 0.00000 0.00064 0.00167 0.00047 B −0.00008 0.00000 −0.000020.00003 0.00007 C 0.00000 0.00000 0.00000 0.00001 0.00002 D 0.000000.00000 0.00000 0.00000 0.00000 E 0.00000 0.00000 0.00000 0.000000.00000 F 0.00000 0.00000 0.00000 0.00000 0.00000 G 0.00000 0.000000.00000 0.00000 0.00000 H 0.00000 0.00000 0.00000 0.00000 0.00000 J0.00000 0.00000 0.00000 0.00000 0.00000

A camera module according to a sixth example will be described withreference to FIG. 17 .

A camera module 106 may include a first optical path folding unit 206, asecond optical path folding unit 210, a lens module 506, a filter IF,and an image sensor IP.

The first optical path folding unit 206 may be configured to refract orreflect a path of incident light incident along a first optical axis C1in the direction of a second optical axis C2. For example, the firstoptical path folding unit 206 may be a prism. An antireflection layerhaving the above-described shape may be formed on the incident surfaceor the exit surface or on the incident surface and the exit surface ofthe first optical path folding unit 206.

The second optical path folding unit 210 may be configured to refract orreflect a path of incident light incident along the second optical axisC2 in the direction of a third optical axis C3. For example, the secondoptical path folding unit 210 may be a prism. An antireflection layerhaving the above-described shape may be formed on the incident surfaceor the exit surface or on the incident surface and the exit surface ofthe second optical path folding unit 210.

The filter IF is disposed in front of the image sensor IP, and may blockinfrared rays or the like included in the incident light. The imagesensor IP may be comprised of a plurality of optical sensors. The imagesensor IP may be configured to convert an optical signal into anelectrical signal. The image sensor IP may form an image plane on whichlight incident through the lens module 506 is imaged.

The lens module 506 includes a first lens 516, a second lens 526, athird lens 536, a fourth lens 546, and a fifth lens 556.

The first lens 516 has positive refractive power. The fifth lens 526 hasa convex object-side surface and a convex image-side surface. The secondlens 526 has negative refractive power. The second lens 526 has aconcave object-side surface and a concave image-side surface. The thirdlens 536 has positive refractive power. The third lens 536 has a convexobject-side surface and a convex image-side surface. The fourth lens 546has negative refractive power. The fourth lens 546 has a concaveobject-side surface and a concave image-side surface. The fifth lens 556has positive refractive power. The fifth lens 556 has a convexobject-side surface and a concave image-side surface.

Table 11 shows the lens characteristics of the lens module 506, andTable 12 shows the aspherical surface values of the lens module 506.FIG. 18 illustrates an aberration curve of the lens module 506configured as above.

TABLE 11 Surface Curvature Thickness/ Refractive Abbe Effective NumberRemark Radius Distance Index Number Radius S1 First Infinity 0.000 3.341Prism S2 Infinity 3.120 1.723 29.5 3.232 S3 Infinity 3.120 1.723 29.54.570 S4 Infinity 0.750 3.232 S5 First 6.090 2.084 1.537 55.7 3.200 LensS6 −74.00 0.037 3.021 S7 Second 260.7 1.157 1.646 23.5 2.986 Lens S85.200 0.992 2.600 S9 Third 5.610 1.673 1.668 20.4 2.599 Lens S10 −40.90.077 2.399 S11 Fourth −105.3 0.714 1.646 23.5 2.357 Lens S12 6.0101.633 2.122 S13 Fifth 16.54 1.046 1.546 56.0 2.091 Lens S14 17.73 5.0002.029 S15 Second Infinity 3.120 1.519 64.2 3.232 Prism S16 Infinity3.120 1.723 29.5 4.570 S17 Infinity 0.000 1.723 29.5 3.232 S18 Infinity6.000 2.415 S19 Filter Infinity 0.110 1.519 64.2 2.738 S20 Infinity4.090 2.742 S21 Image Infinity 0.001 2.988 Plane

TABLE 12 Surface Number 5 6 7 8 9 K −0.44733 −7.83886 99.00000 0.151080.37211 A −0.00013 −0.00009 0.00017 0.00047 0.00035 B 0.00000 0.00000−0.00001 0.00000 −0.00001 C 0.00000 0.00000 0.00000 0.00000 0.00000 D0.00000 0.00000 0.00000 0.00000 0.00000 E 0.00000 0.00000 0.000000.00000 0.00000 F 0.00000 0.00000 0.00000 0.00000 0.00000 G 0.000000.00000 0.00000 0.00000 0.00000 H 0.00000 0.00000 0.00000 0.000000.00000 J 0.00000 0.00000 0.00000 0.00000 0.00000 Surface Number 10 1112 13 14 K −62.20732 0.00000 0.42974 −7.39730 −24.78544 A −0.000010.00000 0.00052 0.00138 0.00039 B −0.00005 0.00000 −0.00001 0.000020.00005 C 0.00000 0.00000 0.00000 0.00001 0.00002 D 0.00000 0.000000.00000 0.00000 0.00000 E 0.00000 0.00000 0.00000 0.00000 0.00000 F0.00000 0.00000 0.00000 0.00000 0.00000 G 0.00000 0.00000 0.000000.00000 0.00000 H 0.00000 0.00000 0.00000 0.00000 0.00000 J 0.000000.00000 0.00000 0.00000 0.00000

In the camera module 106 according to the present example,antireflection layers 300 and 302 may be formed on the first opticalpath folding unit 206 and the second optical path folding unit 210. Forexample, as illustrated in FIG. 19 , the first optical path folding unit206 has the first antireflection layer 300 formed on the incidentsurface, and the second optical path folding unit 210 has the secondantireflection layer 302 formed on the exit surface. The antireflectionlayers 300 and 302 may have a shape of a moth eye including a pluralityof protrusions as described above.

The first antireflection layer 300 and the second antireflection layer302 may have the same type of moth-eye structure. However, the firstantireflection layer 300 and the second antireflection layer 302 do notnecessarily have the same moth-eye structure. For example, the firstantireflection layer 300 may have a moth-eye structure having a denserprotrusion density than the second antireflection layer 302.

The camera module 106 configured as described above has theantireflection layers 300 and 302 formed on the optical path foldingunits 206 and 210, respectively, which are disposed on the object sideand the image plane of the lens module 506, respectively, therebysignificantly increasing the flare suppression effect by theantireflection layers 300 and 302.

Table 13 illustrates conditional expression values of the lens moduleaccording to the respective examples.

TABLE 13 Conditional First Second Third Fourth Fifth Sixth ExpressionExample Example Example Example Example Example f 17.0000 25.000013.0000 18.0000 30.0000 32.0000 PRh/LES1 1.0100 1.0101 1.0098 1.03001.0400 1.0100 n2 + n3 3.3000 3.3000 3.3000 3.3200 3.3140 3.3140 |f1 +f2| 0.6293 0.6103 0.2251 0.7204 2.1934 2.3396 DL1L2/f 0.0034 0.00840.0077 0.0056 0.0011 0.0012 EL1S1/ImgHT 0.9542 0.8900 0.7954 1.06381.0067 1.0738 EL1S2/EL1S1 0.9200 0.9542 0.9434 0.9643 0.9283 0.9441TTL/f 0.9713 1.0070 0.9542 0.8847 0.8824 0.9642 TTL/ImgHT 6.3023 6.29354.3986 5.6468 8.8832 10.3537 R1/f 0.2671 0.2420 0.2600 0.2350 0.19030.1903 f number 3.4000 3.5100 2.9000 3.0000 5.0000 5.0000 |f/f1 + f/f2|0.2946 0.1604 0.1324 0.3676 0.8597 0.8597 f/(f number) 5.0000 7.12254.4828 6.0000 6.0000 6.4000

A portable terminal according to an example will be described withreference to FIG. 21 .

The portable terminal 10 according to the present example may be in theform of a wireless communication device. For example, the portableterminal 10 may be in the form of a wireless telephone such as a smartphone or the like. However, the portable terminal 10 according to thepresent example is not limited to a wireless phone. For example, theportable terminal 10 may be one of other types, such as a laptop or anotebook.

The portable terminal 10 may include a camera module 100. The cameramodule 100 may have a structure illustrated in FIGS. 1 to 6 .Alternatively, the camera module 100 may be one of the types accordingto the first to sixth examples. For example, the camera module 100 mayhave a structure in which a flare phenomenon may be significantlyreduced through an antireflection layer.

Accordingly, the portable terminal 10 according to the present examplemay capture a clear and high-resolution photo or video through thecamera module 100 under any environmental conditions.

As set forth above, according to an example, the reflection of lightoccurring from a filter member or a light transmitting member such as aprism or the like may be reduced or suppressed.

While this disclosure includes specific examples, it will be apparentafter an understanding of the disclosure of this application thatvarious changes in form and details may be made in these exampleswithout departing from the spirit and scope of the claims and theirequivalents. The examples described herein are to be considered in adescriptive sense only, and not for purposes of limitation. Descriptionsof features or aspects in each example are to be considered as beingapplicable to similar features or aspects in other examples. Suitableresults may be achieved if the described techniques are performed in adifferent order, and/or if components in a described system,architecture, device, or circuit are combined in a different manner,and/or replaced or supplemented by other components or theirequivalents. Therefore, the scope of the disclosure is defined not bythe detailed description, but by the claims and their equivalents, andall variations within the scope of the claims and their equivalents areto be construed as being included in the disclosure.

What is claimed is:
 1. A camera module comprising: a lens module; and afirst optical path folding unit disposed on an object side of the lensmodule and configured to refract or reflect incident light in an opticalaxis direction of the lens module, wherein 1.0<PRh/LES1<1.10, where PRhis a maximum effective radius of an exit surface of the first opticalpath folding unit and LES1 is a maximum effective radius of a lensclosest to the object side in the lens module.
 2. The camera module ofclaim 1, wherein the first optical path folding unit comprises anantireflection layer disposed thereon.
 3. The camera module of claim 2,wherein the antireflection layer is disposed on one or both of anincident surface of the first optical path folding unit and the exitsurface of the first optical path folding unit.
 4. The camera module ofclaim 2, wherein the antireflection layer comprises a plurality ofprotrusions.
 5. The camera module of claim 2, wherein the antireflectionlayer comprises: a first antireflection layer disposed on an incidentsurface of the first optical path folding unit and including a firstprotrusion; and a second antireflection forming layer disposed on theexit surface of the first optical path folding unit and including asecond protrusion.
 6. The camera module of claim 5, wherein the firstprotrusion and the second protrusion have different sizes.
 7. The cameramodule of claim 5, wherein a formation gap of the first protrusion isdifferent from a formation gap of the second protrusion.
 8. The cameramodule of claim 1, wherein at least one or more of lenses constitutingthe lens module are configured to have different sizes in a firstdirection and a second direction intersecting an optical axis.
 9. Thecamera module of claim 1, wherein the lens module comprises a firstlens, a second lens, a third lens, a fourth lens, and a fifth lenssequentially disposed from the object side of the lens module.
 10. Thecamera module of claim 9, wherein the first lens, the third lens and thefifth lens have a positive refractive power, and the second lens and thefourth lens have a negative refractive power.
 11. The camera module ofclaim 9, wherein at least four of the first lens, the second lens, thethird lens, the fourth lens, and the fifth lens have a convexobject-side surface.
 12. The camera module of claim 9, wherein at leastthree of the first lens, the second lens, the third lens, the fourthlens, and fifth lens have a concave image-side surface.
 13. The cameramodule of claim 1, further comprising a second optical path folding unitdisposed between the lens module and an image plane.
 14. The cameramodule of claim 13, wherein a second antireflection layer includes aprotrusion and is disposed on one or both of an incident surface of thesecond optical path folding unit and an exit surface of the secondoptical path folding unit.
 15. A portable terminal comprising the cameramodule according to claim 1.